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MIT OpenCourseWareMIT 6.450 Principles of Digital Communications I (revised), Fall 2006 (2006)

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*This version has overhead slides that have had been adjusted for better readability.

The course serves as an introduction to the theory and practice behind many of today's communications systems. 6.450 forms the first of a two-course sequence on digital communication. The second class, 6.451, is offered in the spring.

Topics covered include: digital communications at the block diagram level, data compression, Lempel-Ziv algorithm, scalar and vector quantization, sampling and aliasing, the Nyquist criterion, PAM and QAM modulation, signal constellations, finite-energy waveform spaces, detection, and modeling and system design for wireless communication.



This movie is part of the collection: MIT OpenCourseWare

Producer: MIT OpenCourseWare
Audio/Visual: sound, color
Language: English
Keywords: digital communication; data compression; Lempel-Ziv algorithm; scalar quantization; vector quantization; sampling; aliasing; Nyquist criterion; PAM modulation; QAM modulation; signal constellations; finite-energy waveform spaces; detection; communication system design

Creative Commons license: Attribution-Noncommercial-Share Alike 3.0


Individual Files

Movie Files Thumbnail Animated GIF MPEG4 Ogg Video
Lecture 1: Introduction: A layered view of digital communication 5.8 KB 
362.1 KB 
173.6 MB 
306.7 MB 
Lecture 2: Discrete source encoding 4.9 KB 
318.6 KB 
172.1 MB 
302.8 MB 
Lecture 3: Memory-less sources, prefix free codes, and entropy 5.1 KB 
313.5 KB 
151.6 MB 
272.1 MB 
Lecture 4: Entropy and asymptotic equipartition property 5.3 KB 
345.5 KB 
176.5 MB 
308.6 MB 
Lecture 5: Markov sources and Lempel-Ziv universal codes 4.9 KB 
336.5 KB 
170.6 MB 
269.0 MB 
Lecture 6: Quantization 4.7 KB 
309.9 KB 
172.9 MB 
285.8 MB 
Lecture 7: High rate quantizers and waveform encoding 3.7 KB 
336.7 KB 
174.5 MB 
299.4 MB 
Lecture 8: Measure, fourier series, and fourier transforms 5.6 KB 
350.3 KB 
173.4 MB 
299.9 MB 
Lecture 9: Discrete-time fourier transforms and sampling theorem 3.7 KB 
358.0 KB 
167.7 MB 
310.0 MB 
Lecture 10: Degrees of freedom, orthonormal expansions, and aliasing 4.6 KB 
360.7 KB 
171.0 MB 
320.7 MB 
Lecture 11: Signal space, projection theorem, and modulation 4.9 KB 
348.4 KB 
180.8 MB 
301.3 MB 
Lecture 12: Nyquist theory, pulse amplitude modulation (PAM), quadrature amplitude modulation (QAM), and frequency translation 4.2 KB 
361.9 KB 
176.6 MB 
301.2 MB 
Lecture 13: Random processes 5.7 KB 
352.7 KB 
164.4 MB 
269.3 MB 
Lecture 14: Jointly Gaussian random vectors and processes and white Gaussian noise (WGN) 4.1 KB 
374.4 KB 
175.4 MB 
321.8 MB 
Lecture 15: Linear functionals and filtering of random processes 4.7 KB 
357.3 KB 
170.3 MB 
307.5 MB 
Lecture 16: Review; introduction to detection 3.9 KB 
375.5 KB 
157.6 MB 
279.4 MB 
Lecture 17: Detection for random vectors and processes 6.0 KB 
366.9 KB 
148.6 MB 
264.9 MB 
Lecture 18: Theorem of irrelevance, M-ary detection, and coding 3.1 KB 
339.1 KB 
158.8 MB 
269.7 MB 
Lecture 19: Baseband detection and complex Gaussian processes 2.9 KB 
329.7 KB 
166.6 MB 
262.6 MB 
Lecture 20: Introduction of wireless communication 5.8 KB 
359.9 KB 
166.7 MB 
276.1 MB 
Lecture 21: Doppler spread, time spread, coherence time, and coherence frequency 4.8 KB 
356.6 KB 
167.1 MB 
299.2 MB 
Lecture 22: Discrete-time baseband models for wireless channels 6.3 KB 
361.6 KB 
154.9 MB 
280.2 MB 
Lecture 23: Detection for flat rayleigh fading and incoherent channels, and rake receivers 4.9 KB 
357.7 KB 
140.5 MB 
238.0 MB 
Lecture 24: Case study — code division multiple access (CDMA) 5.5 KB 
373.6 KB 
151.5 MB 
268.0 MB 
Information FormatSize
MIT6.450F06_V2_files.xml Metadata [file] 
MIT6.450F06_V2_meta.xml Metadata 1.7 KB 
MIT6.450F06_V2_reviews.xml Metadata 175.0 B 

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